[i_learn]

first off....what is its use....where will i ever need a pointer to a fucntion . now lets say i awnt to put it in a class.....where do i define the pointer to a member fucntion? and how do i call it.

[TheHeadFL]

Well... pointers to functions are used in 'callback' functions. Wherein another section of code has to make a call backwards to some notifier function that is not neccesarily known at design time.

This is used for event driven programming. You can have the OS 'call back' a function in your program that you specify whenever a certain action happens. (e.g. data is received on a TCP/IP socket)

Also, to point to a member function, you basically need to get a pointer to the object containing the function as well. So you call the callback function pointer like any other function pointer, but you also call (MyObjectType*)(my_objectPointer)->FunctionPointer();

Thats how its done in C++.

[i_learn]

i dont really get what u just said......what can i do that i cant do with just a function. i could call it again if i wanted to right?
and use this example...
class test
{
public:
void func();
//do i put the function pointers signature here?
};

void main()
{
//or do i put it here?
//and how do i call it
test (*x)();
}